diff --git a/stdlib/ntpath.pyi b/stdlib/ntpath.pyi
index f1fa137c6..1a58b52de 100644
--- a/stdlib/ntpath.pyi
+++ b/stdlib/ntpath.pyi
@@ -42,6 +42,9 @@ from posixpath import (
     splitext as splitext,
     supports_unicode_filenames as supports_unicode_filenames,
 )
+
+if sys.version_info >= (3, 12):
+    from posixpath import isjunction as isjunction, splitroot as splitroot
 from typing import AnyStr, overload
 from typing_extensions import LiteralString
 
@@ -85,6 +88,8 @@ __all__ = [
     "samestat",
     "commonpath",
 ]
+if sys.version_info >= (3, 12):
+    __all__ += ["isjunction", "splitroot"]
 
 altsep: LiteralString
 
diff --git a/stdlib/posixpath.pyi b/stdlib/posixpath.pyi
index 1945190be..45a8ad7ec 100644
--- a/stdlib/posixpath.pyi
+++ b/stdlib/posixpath.pyi
@@ -58,6 +58,8 @@ __all__ = [
     "relpath",
     "commonpath",
 ]
+if sys.version_info >= (3, 12):
+    __all__ += ["isjunction", "splitroot"]
 
 supports_unicode_filenames: bool
 # aliases (also in os)
@@ -150,3 +152,10 @@ def isabs(s: StrOrBytesPath) -> bool: ...
 def islink(path: FileDescriptorOrPath) -> bool: ...
 def ismount(path: FileDescriptorOrPath) -> bool: ...
 def lexists(path: FileDescriptorOrPath) -> bool: ...
+
+if sys.version_info >= (3, 12):
+    def isjunction(path: StrOrBytesPath) -> bool: ...
+    @overload
+    def splitroot(p: AnyOrLiteralStr) -> tuple[AnyOrLiteralStr, AnyOrLiteralStr, AnyOrLiteralStr]: ...
+    @overload
+    def splitroot(p: PathLike[AnyStr]) -> tuple[AnyStr, AnyStr, AnyStr]: ...
diff --git a/tests/stubtest_allowlists/py312.txt b/tests/stubtest_allowlists/py312.txt
index 0a7bec9d1..8e585797d 100644
--- a/tests/stubtest_allowlists/py312.txt
+++ b/tests/stubtest_allowlists/py312.txt
@@ -33,21 +33,12 @@ importlib.resources.files
 importlib.util.module_for_loader
 importlib.util.set_loader
 importlib.util.set_package
-ntpath.__all__
-ntpath.isjunction
-ntpath.splitroot
 os.DirEntry.is_junction
-os.path.__all__
-os.path.isjunction
-os.path.splitroot
 pathlib.Path.__init__
 pathlib.PurePath.__init__
 pathlib.PurePath.is_relative_to
 pathlib.PurePath.relative_to
 poplib.POP3_SSL.__init__
-posixpath.__all__
-posixpath.isjunction
-posixpath.splitroot
 smtplib.SMTP.starttls
 smtplib.SMTP_SSL.__init__
 typing.ParamSpec.__mro_entries__